I’ve installed react by installing create-react-app after that when i ejected the file and added modules: trues, localIdentName : ‘[name][local][hash:base64:5]’ to webpack.config.dev & webpack.config.prod and restart the app by writing npm start then it’s showing this problem …

At the risk of stating the obvious, did you checked for the presence of ‘babel-loader’? I still don’t use webpack, but I found this package which seems exactly the one you’re missing ( webpack plugin for babel ) because of the ejecting process ^^